Spaceship Earth

http://alternatives-magazine.com/spaceshipearth.html

By Donald H. Peterson
 
Although you may never have thought about it, living on Earth as it soars through empty space shares a very critical characteristic with an astronaut traveling through space on a spaceship. Namely, you are totally dependent on the life support resources that are already on theEarth, because with the exception of radiant energy from the sun, the surrounding space environment provides absolutely nothing to support life. MORE >>

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